2018 Ram 3500 Towing Capacity & Payload

The 2018 Ram 3500 is a heavy-duty truck designed for serious towing and hauling, with a maximum towing capacity that can exceed 30,000 pounds when properly equipped.

Quick Answer

• Max Conventional Towing Capacity: 20,000 lbs
• Max 5th-Wheel/Gooseneck Towing Capacity: 31,210 lbs
• Max Payload Capacity: 7,390 lbs
• Gross Vehicle Weight Rating (GVWR): 10,000 - 14,000 lbs
• Gross Combined Weight Rating (GCWR): 20,000 - 39,100 lbs
• Curb Weight: 6,750 - 8,920 lbs
• Hitch Class: Class V (Integrated into bumper for conventional towing, typically rated for 18,000 lbs with weight distribution. Higher capacities require frame-mounted hitches or 5th-wheel/gooseneck setups.)

Note: All ratings are approximate and can vary significantly based on specific configuration (engine, drivetrain, cab type, bed length, axle ratio, and installed options). Always refer to your vehicle's door jamb sticker and owner's manual for the most accurate information.

Tow Ratings by Engine & Trim

The 2018 Ram 3500 offers impressive towing capabilities across its engine and drivetrain options. The mighty 6.7L Cummins Turbo Diesel is the king of towing, especially with the Aisin automatic transmission, enabling the highest 5th-wheel/gooseneck capacities.

These figures represent maximum capacities. Actual capacities depend on specific vehicle configuration, options, and passenger/cargo weight.

Tow Package Contents

The 2018 Ram 3500 typically comes well-equipped for towing, but an optional dealer-installed or factory-installed Towing Technology Group or similar package can enhance capabilities and safety. Key components often include:

• Heavy-Duty Engine Cooling: Larger radiator and fan to help maintain optimal engine temperatures during demanding towing.
• Trailer Brake Controller (Integrated): Allows the driver to control the electronic brakes on a trailer directly from the dashboard, ensuring synchronized braking between the truck and trailer.
• Trailer Sway Control (TSC): Uses the truck's electronic stability control system to detect and counteract trailer sway, improving stability and safety.
• Trailer Tow Mirrors: Larger mirrors, often extendable and with power-folding and heating, to provide a better view of the trailer and surroundings.
• 7-Pin and 4-Pin Trailer Wiring Harness: Provides electrical connections for trailer lights, brakes, and auxiliary power.
• Transmission Oil Cooler: Helps keep transmission fluid temperatures down, crucial for transmission longevity when towing heavy loads.
• Lower Axle Ratio (Optional): A numerically higher axle ratio can increase towing capacity at the expense of slightly higher engine RPMs at highway speeds.

5th-Wheel & Gooseneck Towing

As a heavy-duty truck, the 2018 Ram 3500 excels at 5th-wheel and gooseneck towing, offering significantly higher capacities than conventional hitch towing. This is due to the weight of the trailer being distributed directly over the rear axle of the truck, improving stability and reducing stress on the rear suspension.

For 2018, the Ram 3500, particularly with the High Output Cummins engine and Aisin transmission, offers a maximum 5th-wheel/gooseneck towing capacity of up to 31,210 lbs. Owners will need to install a compatible 5th-wheel hitch or gooseneck ball in the truck bed, which typically bolts to the frame. Always ensure the hitch system itself is rated to handle the load you intend to tow.

Weight Distribution & WDH Requirements

For conventional towing, especially with trailers exceeding 5,000 lbs or with significant tongue weight, a Weight Distributing Hitch (WDH) is strongly recommended for the 2018 Ram 3500. A WDH helps distribute the trailer's tongue weight more evenly across all axles of the tow vehicle and trailer, restoring lost front-axle weight and improving steering, braking, and stability. While heavy-duty trucks like the Ram 3500 can sometimes tow lighter loads without a WDH, using one for heavier conventional trailers is a best practice for safety and handling.

Always ensure your WDH is properly rated for your trailer's tongue weight and gross trailer weight. Consult your owner's manual for specific recommendations on when to use a WDH and for proper setup procedures.

Real-World Towing Tips for this Vehicle

• Know Your Weights: Before every trip, calculate the total weight of your loaded trailer, truck (including passengers and cargo), and ensure you are within your vehicle's GVWR, GCWR, GAWR, and tire ratings. Do not rely solely on advertised "max towing" figures.
• Proper Hitch Setup: Ensure your conventional or 5th-wheel/gooseneck hitch is properly installed and rated for your load. Correct tongue weight (10-15% for conventional, 15-25% for 5th-wheel/gooseneck) is critical.
• Check Tire Pressure: Maintain correct tire pressure for both the truck and trailer, as specified by the manufacturers, to ensure stability and load-carrying capability.
• Trailer Brakes: Always use a trailer brake controller for trailers equipped with electric brakes. Adjust the gain setting for smooth, synchronized braking.
• Perform Pre-Trip Inspections: Check lights, tires, fluid levels, and secure all cargo before heading out.
• Drive Conservatively: Allow more space for braking, accelerate gently, and anticipate turns and stops. Avoid sudden maneuvers.
• Monitor Temperatures: Keep an eye on engine and transmission temperatures, especially on long grades or in hot weather. The heavy-duty cooling systems in the Ram 3500 are robust, but it's always wise to monitor.

Common Towing-Related Issues

Despite its robust design, the 2018 Ram 3500 can experience some common towing-related issues if not properly maintained or operated beyond its limits:

• Transmission Overheating: While the Ram 3500 has robust cooling, prolonged towing in extreme conditions or with excessive loads can still cause transmission fluid temperatures to rise. Regular transmission fluid changes are crucial.
• Brake Wear: Towing heavy loads significantly increases wear on brake components. Monitor brake pad and rotor condition and replace them as needed with heavy-duty parts.
• Suspension Sag: Even with heavy-duty springs, extreme tongue weight can cause rear suspension sag. Airbag helper springs or other suspension enhancements can improve ride height and stability under heavy loads.
• Tire Issues: Under-inflated or improperly rated tires are a significant safety hazard. Overloading tires can lead to blowouts. Always use tires rated for the load and maintain correct pressure.
• DPF/DEF System Issues (Diesel): For diesel models, sustained heavy towing (which keeps the engine hotter) can actually be beneficial for the DPF (Diesel Particulate Filter) system, helping it regenerate more effectively. However, short trips or excessive idling while loaded can still lead to DPF clogging or DEF (Diesel Exhaust Fluid) consumption issues.

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